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TI-2026-13345 Aliases CVE-2026-15931GHSA-cc2x-fmqx-2g5v

Simple Membership < 4.7.8 - Unauthenticated Stored XSS via PayPal Subscription Subscriber Name

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

The Simple Membership WordPress plugin before 4.7.8 does not sanitise a subscriber name value received from an unauthenticated payment approval request, nor escape it when displaying it in the administration dashboard, allowing unauthenticated attackers to store arbitrary JavaScript that executes in an administrator's session.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00275 20th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Simple Membership (Unknown): 4.7.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownSimple Membershipbefore 4.7.84.7.8Patch availableCNA
  • Simple Membership VendorUnknown Affected before 4.7.8 Fixed in 4.7.8 Patch available CNA

Remediation

  • Fix · CNA Simple Membership (Unknown) Fixed in 4.7.8

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Simple Membership 4.7.8

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-13344 Simple Membership < 4.7.8 - Unauthenticated Administrator Account Takeover via Registration Username CollisionPriority MEDIUM 47
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-15931
  2. 2026-10-03 Alias added: GHSA-cc2x-fmqx-2g5v

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences